Press for mounting sound-matrices



C. F. BURROUGHS.

PRESS FOR MOUNTING SOUND MATRICES.

APPLICATION FILED JUNE 15, 19m. RENEWED OCT. 3,1

Pat iited Jan. 20,1920.

3 SHEETS-SHEET C. F..BURROUGHS.'

PRESS FOR moumma s'oumn MATRICES.

APPLICATION FILED JUNE 15, 19%8. RENEWED OCT. 3,1919.

3 SHEETSSHEET 2- 0'. F. BURROUGH-S. PRESS FOR MOUNTING SOUND MATRICES. APPLICATION FILED JUNE 1-5. 1918- RENEWED OCT- 1 1 l9.

lav/9:6.

ente n. 20,1920.

a 8-SHEET3.

'- ran srx'rns PAENT FFIGE.

CHARLES F. BURROUGHS, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO COMPOSITION MACHINERY CORPORATION, OF NEWARK,NEW JERSEY, A CORPORATION OF NEW JERSEY.

Application filed June 15,1918, Serial No. 240,188. Renewed October 3, 1919.

To all whom it may concern Be it known that 1, CHARLES F. BUR

county of Essex, State of New Jersey, have invented certain new and useful Improvements in Presses for Mounting Sound-Matrices, fullydescribed and represented in the following specification and the accompanying drawings, forming a part ofv the same.

This invention consists of a special form of hydraulic press which is adapted to perform various pressing operations, but is designed particularly to press a thin flexible metallic matrix upon a rigid bed-piece while the two are secured firmlytogether at the margin.

In the manufacture of phonographic diskrecords, the matrix consists of such a thin disk of metal, which must be firmly connected to a bed-piece, by which it may be held in the molding-press and heated and cooled in accordance with the requirements of the molding operation.

Heretofore, such thin matrices have been secured at their margin'to a fiat metallic bedpieoe adapted to readily transmitchanges of temperature to the matrix when used "in a molding-press.

The present invention furnishes means for pressing the" thin matrix very strongly upon the surface of its bed-piece while the margin of the matrix is secured thereto.

It has been found thatthe mere attachmentof the matrix at its edge to the basepiece is not SllfllCle'lll] to hold the matrix in a completely flattened condition, as the process of manufacturing the matrix does not impart to it a perfectly plane surface to contact with the bed-piece.

The present 4 invention furnishes means, without injuring the matrix, to press it very stronglytoward the bed-piece and to thus hold'it while the margin of the matrix is secured thereto. This treatment of the matrix while fastening it to the bed-piece, is found to flatten the matrix perfectly and produce a uniform contact between the matrix and the bed-piece, and to permit the edge of the matrix to :be clamped more firmly to the bedpiece. This results in the flattening out PRESS FOR DIOUN'IING SOUND-MATRICES.

Specification of Letters Patent.

Patented Jan. 20,1920.

-erial N0. 328,332.

of any inequalities in the form of the matrix, and thusslightly spreading its margin whlc-h, when firmly secured to the bed-piece,

continues to hold the matrix in a flattened elevation of the force, removed from the upper part of the hydraulic press and drawn, partly in central section, uponthe same scale as Fig. 12; Fig. 4: is a plan of the force upon the same scale as Fig. 3; Fig. 5 shows a bed-piece and matrix in section upon a much larger scale, with portions of the force and head employed to press the parts together, the lower portion of the head and the attached ram not being in sec tion; Fig. 5 is an enlarged section of-tho clamping-ring and its connected parts; Fig. 6 is an edge View of the clamping-ring for the matrix; Fig. 7 is a plan of the parts below thetop of the bed-piece in Fig. 5; and Fig. 8 is a plan of the head with the spring-plate therein.

The chief operative parts of the invention aresh'own in Fig. 5, where a designates a head movable toward and from a force or platen C, between which head and force the bed-piece c and matrix 01 are clamped, while a clampingring e is pressed upon the edge of the matrix by screw-studs 7" extended through holes in the bed-piece and locked therein by nuts 9. 1

Sockets h are formed in the bed-piece to receive the nuts, so that their outer sides are nearly flush with the outside of the bedpiece. The sockets afford room for the application of a wrench. I The head of such a wrench, and part of the handle, is shown in section in Fig. 5.

The clamping-ring is formed with a shoulder 6' embracing the periphery of the matrix (Z and with a jaw forming an annular ridge 6 over themargin of the matrix.

A'hole i is formed through the center of the matrix and bed-piece, and a flanged pin in, I

j is shown screwed into said hole with its flange clamping the middle portion of the matrix firmly upon the bed-piece.

The head a is provided with an annular groove Z to receive the ridge 0 upon the clampingring, and the head is formed, 1nside the line of such groove, with a recess m in which an annular spring-plate n is fitted movably around a hub n in the center of such recess. The hub is formed with a hole 0 to receive the projecting end 0. of the pin j, which centers the parts upon the head.

A series of springs 29 is located in the recess under the spring-plate, tending to force the same normally upward, and such movement is limited by screws 29, the heads of which are fitted to sockets p in the springplate. The spring-plate is faced with a layer m of elastiomaterial, asfelt, which contacts with the operative side of the matrix (5 during the pressing operation.

The means of pressing the head and force together is shown in Figs. 1 and 2, in which a suitable four-sided frame A is shown provided in the bottom with a hydraulic cylinder B, and in the upper part with a force or platen C.

The head D is provided with a ram D fitted to the cylinder B, and guides E are shown upon the frame to keep the head D from turning. The force C is secured in the top of the press by a shank C and nut C The frame A is provided with a downwardly projecting pedestal A which is supported upon a stand F having a socket G in the center provided with a hydraulic supply by pipe H. To operate the press, said pipe requires connection to a hydraulic accumulator, and also to a waste-pipe.

The pedestal is shown with a flange I to rest upon the top of the socket G and with a boss J upon its lower end fitted to rotate in the socket for the purpose herein described. The boss is made smaller than the socket to admit hydraulic packings K which embrace the boss in the upper and lower ends of the socket and prevent any leakage therefrom. The boss is adjusted to turn in the socket by means of a washer L and nut L fitted to a threaded stud M in the bottom of the socket.

The center passage A in the pedestal connects the cylinder B with the boss J, and

holes a" through the sides of the boss permit the fluid under pressure to enter the boss and operate upon the ram D. An anti-friction washer I is inserted between the flange I and the top of the socket.

A rotatable construction for the pedestal upon the stand F is preferable, to enable the operator without changing his position to tighten successively the nuts 9 which are provided to secure the clamping-ring and matrix tightly upon the bed-piece.

jaw e in the groove Z is only effected when the head I) is forced upwardly by the hydrauhc ram at the pleasure of the operator, thus presslng the head forcibly toward the force O, which crowds the bed-piece downward with the spring-plate at until the jaw e of the clamping-ring is fully seated in the groove Z, and thereafter holds the parts pressed together with great force while the clamping-ring is tightened upon the edge of the matrix. the bed-piece, it is guided by the central pin 0.

The pressure of the spring-plate against the matrix flattens the latter out perfectly when the clamping-ring is wholly seated, and the final effect of the pressure is to crowd the jaw of the clamping-ring firmly upon the edge of the matrix, as shown in Figs. 5 and 5 so that the matrix is gripped to the bed-piece more firmly than could. be effected by any agency short of a hydraulic pressure. While in this closely pressed state, the clamping-ring is tightly secured by applying a wrench t to the nuts upon the studs of the clamping-ring.

. The studs 7 are formed upon the clamping-ring close to the jaw of the latter, so that the nuts upon the set-screws may hold the jaw firmly, and the force C could not press the jaw firmly against the edge of the matrix without partially covering the said nuts, except the edge of the jaw were notched to clear the nut. The hydraulic pressure is, however, concentrated upon the clampingring by forming the force, asshown in Figs. 3 and a with notches b in its edges corresponding in number to the screws f and nuts 9.

By this construction the fingers upon the force, intermediate to the notches, may extend out to the extreme edge of the bedpieoe and exert the full pressure upon the clamping-ring, while the notches expose the In this seating movement of nuts to access while the ring is thus clamped I for applying the wrench t which is shown partly in section at the left side of Fig. 5.

With the clamping-ring pressed to the bed-piece by the hydraulic pressure, the

wrench is enabled to screw the nuts down u more tightly and thus enable them to retain the clamping-ring in the position to which it has been crowded by the action of the force.

By partly rotating the press upon its stand after tightening each nut g, the operator can bring all the nuts successively to his hand without changing his position.

Having thus set forth the nature of the invention what is claimed herein is:

1. The means for mounting a thin matrix upon a bed-piece having a clampingring upon its margin to engage the edge of the matrix such means consisting of a head and force movable in relation to one another with means for pressing them forcibly together and the head provided with an annular seat to receive the clamping-ring, and the force being fitted to press upon the bedpieceopposite to the said ring.

2. The means for mounting a thin matrix upon a bed-piece having a flanged pin in the center and a clamping-ring upon its margin adapted respectively to engage the center of the matrix and the edge there of, such means consisting of a head and force movable in relation to one another with means for pressing them forcibly together and the head provided with an annular seat to receive the clamping-ring, and the force being fitted to press upon the bedpiece opposite to the said rin 3. The means for mounting a thin matrix upon a bed-piece having a clampingring upon its margin with screws and flanged nuts for securing it to the bed-piece, consisting of a seat for the matrix and bed piece and a force for pressing them upon the seat, the said force having notches in the edge to clear the flanged nuts to permit the tightening of said nuts while the bed and matrix are under pressure.

a. The means for mounting a thin matrix upon a bed-piece having a clamping-ring upon its margin with a ridge over the clamping-j aw of said ring, and screws and flanged nuts for securing the clamping-ring to the bed-piece, which means consists of a head having an annular seat to receive the ridge of the clamping-ring, and a force extended to the margin of the clamping-ring and having notches upon its edges adjacent to the nut to permit the turning of the same.

5. The means for mounting a thin matrix upon a bed-piece having a clamping-ring upon its margin with a ridge over the clampingjaw of said ring, and screws and flanged nuts for securing the clamping-ring to the bed-piece, which means consists of a head having an annular seat to receive the ridge of the clamping-ring, a spring-plate within the annular seat to press the surface of the matrix against the bed-piece, a force applied to the outer side of the bed-piece, and means for moving the seat and force relatively to one another to press the edge of-the matrix firmly upon the bed-piece while securing the clamping ring in its final adjustment.

6. The means for mounting a thin matrix upon a bed-piece having a clamping-ring upon its margin With a ridge over the clamping-jaw of said ring, and fasteningupon a bed-piece having a flanged screwpin in the center to clamp the center of the matrix thereto and having a clamping-ring upon the margin with a ridge over the clamping-jaw of said ring and screws for securing the ring to the bed-piece, such means CORSlStiIlg of a movable ram with a head having upon the top an annular seat with groove to receive the ridge of the clamping-ring, the head having a recess within the annular seat, a hub in the center of the same with socket to receive the center pin, an annular spring-plate fitted movably between the hub and the annular grooved seat with a yielding facing upon its outer side, springs fitted beneath the spring-plate to press it normally outward, means to limit such outward movement, and a force operating to press the bed-piece,'the matrix and the clamping-ring firmly together, while the clamping-ring is secured to the bedpiece.

8. A mounting press for clamping a circular matrix upon a bed-piece by a clamping-ring, consisting of a suitable frame, a suitable force fixed in one end of the frame, a head movableinthe opposite end of the frame and provided with an annular seat to receive the clamping-ring, and means for pressing the head toward the force.

9. A mounting press for clamping a circular matrix upon a bed-piece by a clamping ring having an annular ridge, consisting of a rectangular frame having a force in its upper part with notches upon its edge, a head movable in its lower part and provided with an annular grooved seat to receive the ridge upon the clamping-ring, and means for pressing the head upwardly toward the force.

10. A mounting press, consisting of a suitable frame with a hydraulic cylinder in its 7. The means for mounting a thin matrix 15 part of the frame, a suitable stand with socket havlng a hydraulic connection, a

10 cularmatrix upon abed-piece by a clamp lower end, a head movable in the frame with ram fitted to the cylinder, a force securedin the upper part ofthe frame, a suitable stand with socket having a hydraulic connection,

draulic fluid thereto, I fill! A mountmg press for clamping aciring ring, consistin of a suitableframe with "a hydraulic cylinder in its lower end, a j iead'inovable 1n the frame wlth ram fitted tothe cylinder, a force secured in the upper pedestal extended downward from the frame and fitted rotatably to the socket, and provided with a passage to convey the hydraulic fluid from the socket to the cylinder inthe frame.

my hand; v

12; A mounting press for clamping a cirring,consisting of a suitable frame with a hydraulic cylinder in' its lower end, a head movable in the frame with ram fitted to the cylinder, a force secured'in the upper part of the frame, a ,suitablestand with socket having a hydraulic connection, a pedestal, extended downward from the frame and M having flange to rest upon the stand, and a bossextended within the socket and having annular packings between the said bossa-nd socket at the upper and lower ends, the base having holes extended throughits sides, and

a center passage extending from the holes through the pedestal to the cylinder, and lneans'for securing the boss rotatably in the socket of the stand. i

In testimony whereof I have hereunto set CHAR-LES F. BURROUGHS.

' cular matrix upon a bedpie'ce by a clamping 

